package com.etc.common;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Random;

import javax.imageio.ImageIO;
import javax.imageio.stream.FileImageOutputStream;

/*对图片进行处理的类和方法*/

public class VerifyCode {

	public static void main(String[] args) throws IOException {
		
		
		OutputStream ios = new FileOutputStream(new File("d://tmp.png"));
		
		String tmp = drawRamdomText(ios);
		System.out.println(tmp);

	}
	public static String drawRamdomText(OutputStream ios) {
		
		 
        int width=200;

        int height=69;

        BufferedImage verifyImg=new BufferedImage(width,height, BufferedImage.TYPE_INT_RGB);
    	//生成对应宽高的初始图片
        String randomText = VerifyCode.drawRandomText(width,height,verifyImg);
    	try {
			ImageIO.write(verifyImg,"png",ios);
			ios.flush();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return randomText;
    
    	
	}
	public static String drawRandomText(int width, int height, BufferedImage verifyImg) {

		Graphics2D graphics = (Graphics2D) verifyImg.getGraphics();

		graphics.setColor(Color.WHITE);// 设置画笔颜色-验证码背景色

		graphics.fillRect(0, 0, width, height);// 填充背景

		graphics.setFont(new Font("微软雅黑", Font.BOLD, 40));

		// 数字和字母的组合

		String baseNumLetter = "123456789abcdefghijklmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ";

		StringBuffer sBuffer = new StringBuffer();

		int x = 10; // 旋转原点的 x 坐标

		String ch = "";

		Random random = new Random();

		for (int i = 0; i < 4; i++) {

			graphics.setColor(getRandomColor());

			// 设置字体旋转角度

			int degree = random.nextInt() % 30; // 角度小于30度

			int dot = random.nextInt(baseNumLetter.length());

			ch = baseNumLetter.charAt(dot) + "";

			sBuffer.append(ch);

			// 正向旋转

			graphics.rotate(degree * Math.PI / 180, x, 45);

			graphics.drawString(ch, x, 45);

			// 反向旋转

			graphics.rotate(-degree * Math.PI / 180, x, 45);

			x += 48;

		}

		// 画干扰线
		for (int i = 0; i < 6; i++) {

			// 设置随机颜色
			graphics.setColor(getRandomColor());

			// 随机画线

			graphics.drawLine(random.nextInt(width), random.nextInt(height),

			random.nextInt(width), random.nextInt(height));

		}

		// 添加噪点

		for (int i = 0; i < 30; i++) {

			int x1 = random.nextInt(width);

			int y1 = random.nextInt(height);

			graphics.setColor(getRandomColor());

			graphics.fillRect(x1, y1, 2, 2);

		}

		return sBuffer.toString();

	}

	/**
	 * 随机取色
	 */

	private static Color getRandomColor() {

		Random ran = new Random();

		Color color = new Color(ran.nextInt(256),

		ran.nextInt(256), ran.nextInt(256));

		return color;

	}

}